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uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
Video Downloader VeeVee
Video Downloader VeeVee – download videos from the Internet.
Bitwarden - Free Password Manager
Бяспечны і бясплатны менеджар пароляў для ўсіх вашых прылад.
Sidebar for YouTube™
Easy Access to YouTube via Sidebar UI
Pacman
A Pacman game on a popup, now version 1.2!
GX Calculator
Simple GX-style calculator adapts to the current colors and also reacts to keystrokes.
Facebook Opera Sidebar
Access Facebook through Opera Sidebar.
Sidebar Sticky Note
Free HTML5 Sidebar Sticky Notes
Sidebar for Google™ Translate
Easy Access to Google Translate via Sidebar UI
Sidebar for YouTube™
Simple access to YouTube using the sidebar UI
Sidebar for Youtube Music
Youtube Music sidebar extension
Note Sidebar
Simple note sidebar which can be used to write a note, record thoughts, to-do list, meeting notes, etc.
Sidebar Sketch
Sketch anytime on your sidebar, even offline.
QR Code Generator
Generate any QR code anytime, even offline
Text to Voice
Open sidebar selected text and click in context menu 'Selected text to Speech' to listen
Sidenotes
Simple notes for your Opera sidebar
Sudoku Sidebar
Play Sudoku on Sidebar anytime in your browser! even offline!
Emoji Minesweeper
Play Minesweeper as Emojis!
Vertical Tabs
Manage your tabs in the sidebar!
Quick Notes
The extension allows you to quickly save text notes on the sidebar of your browser.
Bing Translate
Easily access Bing Translate from Opera's sidebar
Raindrop.io - Smart Bookmarks
All-in-one bookmark manager
Twitter Lite Sidebar (Unofficial)
Access Twitter Lite through Opera Sidebar. This is an UNOFFICIAL extensions.
Sudoku v2
Play Sudoku from sidebar anytime even offline
Web Panel
Navigate to websites in the sidebar.
Simple Notes
Simple notes in a panel, with a context menu item to copy text to a note.
Tree Tabs
Manage your tabs in the sidebar!
Google Messages for Opera Sidebar
This Add-On allows you to send text messages from your Opera Browser, to anyone you want.
uMatrix
Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.
Google Messages Sidebar
Access to Google Messages website on the sidebar.
Bookmarks Manager and Viewer
An elegant bookmark manager with fuzzy search and more